Validation of our photometric metallicities and distances with GALAH DR3 and APOGEE DR17 surveys and the high-resolution spectroscopic metallicities from the SAGA database of VMP stars (top) and Starhorse Gaia DR3 (Bayesian isochrone-fitting code) distances for different spectroscopic surveys such as APOGEE, GALAH, SDSS SEGUE, LAMOST MRS, and Gaia RVS surveys (bottom) for the PDR1 (left) and PGS (right) giants catalogue constructed in this work.